Jan. 14, 2006
30 min.
Cartoon Network TV Network

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Ben 10

The story of Ben, a typical kid who becomes very atypical after he discovers the Omnitrix, a mysterious alien weapon with the power to transform the wearer into ten different alien species.

Characters: #4 of 24 (Full List)
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Grey Matter Ben 10
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Grey Matter

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  Played by:
Richard Steven HorvitzRichard Steven Horvitz
Richard Horvitz was born in Los Angeles, California, in the summer of 1966. He began acting professionally ...

Character Bio

Grey Matter photo
Grey Matter's small size belies his great calculative and technical intellect. He can create complicated machines from spare parts, understand the function of any device at a glance, and make sophisticated repairs to complex machines, (such as a warp-drive engine). Grey Matter's intellect serves as a problem solver and analytical help in difficult situations. This allows Grey Matter to think more strategically when brute force is inefficient.

Grey Matter can sometimes manipulate living things by stimulating certain parts of their nervous system, if such beings can be controlled by external stimuli.

Grey Matter's size allows him to squeeze into small spaces and can climb walls due to tiny suction cups on his skin. He also has sharp teeth and his slimy skin makes him difficult to grab.

Grey Matter appears to be stronger than he looks, as he was strong enough to move a cleaner's bucket with mops in it in Ultimate Weapon, and in So Long, and Thanks for All the Smoothies, he was able to break a coolant pipe to freeze the Vreedle Brothers.

According to Derrick J. Wyatt, Grey Matter is amphibious and has gills.

Grey Matter has a long prehensile tongue, owing to his insectivore nature. As a Galvan, he also possesses a 'pre-brain' which deals with all basic bodily functions.

Grey Matter was able to understand Pyxi's speech in Rad.

Episode Screenshots

04x03 - Don't Drink the Water
Season 4, Episode 03
01x12 - Side Effects
Season 1, Episode 12
03x07 - Super Alien Hero Buddy Adventures
Season 3, Episode 07
03x13 - The Visitor
Season 3, Episode 13
[More Episodes]

Grey Matter Photos

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